Wall furnace



1964 M. 1.. STARK ETAL WALL FURNACE 2 Sheets-Sheet 1 Filed May 2, 1961 MARVIN L.STARK d EIRANK (L. L

Feb. 4, 1964 M. L. STARK ETAL 3,120,225

WALL FURNACE Filed May 2, 1961 2 Sheets-Sheet 2 FIG. 4.

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1 1 a c f l 2 1 9 15 I C i 5 F 5 c3" 5a 11 17 1 \\l\ INVENTORS MARVIN L.STARK "d TRANK c. LEWIS United States Patent Ofltice 3,120,225 l atented Feb. 4, 1964 3,12%,225 WALL FURNACE Mm'in L. Stark and Frank (1. Lewis, both of Louisville,

Ky., assignors to Peerless h lauufaeturing Division,

Dover Corporation, Louisville, KY. a corporation or Kenbuclq/ Ffled May 2, 1961, Ser. N 37,131 2 Claims. (Cl. 126-110) This invention relates to wall furnaces of the type used in heating room space.

Heretofore, it has been the general practice to heat each room with individual gas-fired wall furnaces which could be controlled at will, particularly in dwellings without basements where a bulky and unwieldingly central heating furnace is usually installed. In wall furnaces of the type referred to, fresh air is drawn into a combustion chamber usually vented by an exhaust flue passing through the fresh air inlet, and also the room space air is recirculated with heated fresh air.

Although the present invention utilizes some of the foregoing more or less standard features, nevertheless, its primary object is to provide an outer housing and an inner heater casing in which heated air may be built up under pressure for release not only into the room space in which the furnace is installed but also into headers for release through suitable ports into ducts for distribution to other rooms or areas. Thus the present invention materially increases the range of utility of a single gas fired wall furnace.

With the above and other objects in view which will more readily appear as the nature of the invention is better understood, the invention consists in the novel construction, combination and arrangement of parts, hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is shown in the accompanying drawings, in which:

PZGURE 1 is a perspective view of the complete wall furnace.

FlGURE 2 is a front elevation of the furnace shown in FIGURE 1 with the front panel removed.

FIGURE 3 is a vertical cross section.

FlGURE 4 is a schematic perspective view illustrating the path of various air currents taken into and discharged from the furnace.

FIGURE 5 is a detail horizontal cross sectional view taken at the location of the fresh air inlet and exhaust flues.

Similar reference characters designate corresponding parts throughout the several figures of the drawings.

Referring to FIGURE 1, it will be observed that the furnace includes an external housing designated generally as H and an internal heater casing H.

The outer housing H is provided with a back wall 1 connected with a top wall 2 provided with a louvered top room space air inlet 3. The back wall 1 is connected with a tubular flue P which cooperates with a tubular exhaust flue F to provide a fresh air intake passage 4. The flues F and F are, in accordance with standard practice, fitted in a room space outer wall W. The back wall 1 of the housing is connected with forwardly extending outer side walls 5 whose front edges are flanged inwardly as at 5 (FIG. 2) and which cooperate with a front panel 6 to provide the wall of the furnace which faces the room space. This panel is provided with a medial louvered or similar heated air outlet 7. The back wall 1 has a bottom 8 supported by relatively short legs and is also provided with an opening 8 normally covered by a patch plate S capable of being removed to permit of connecting the bottom of the heater with suitable air ducts leading to a dilferent room.

This outer housing conceals an inner heater casing H including a rear sealing wall 9 spaced from the back wall 1 and whose upper edge engages the inner face of the top wall 2 while its lower edge terminates in a forwardly extending bottom wall it) connecting with a from apron flange 10 The bottom wall 19 supports a control box D containing the electrical equipment for operating the blower and gas burner. It will thus be seen that the upper and lower ends of the sealing wall- 9 are closed thereby to provide with the wall 1, a fresh air intake compartment C which communicates with the fresh air intake 4 of the flue F.

As will further be seen from FIGURE 4, the sealing wall 9 of the inner heater casing H is provided at its edges with the forwardly extending side inner flanges 11 having ports 12. The inner side flanges 11 are parallel to and spaced inwardly from the inside faces of outer side walls 5 of the outer housing H to provide remote air distribution headers 13 so that warm air issuing from side ports 12 will enter said headers and build up pressure to be led off through appropriate ducts 14.

The compartment C is sealed at its sides and bottom by compressed insulation sheets C and C as respectively shown in FIGS. 1, 3, and 5, to break the outside fresh air going to the combustion chamber of the burner from the heated room space tempering air generated within the inner casing.

With further reference to the inner heater casing H, it includes a combustion box designated generally as 15 closed at the front, bottom, top, and sides so that the products of combustion issuing from the burner 16 are confined therein. The rear wall of the combustion box 15 is provided with an opening 15 (FIG. 3) communicating with the fresh air intake chamber C at the inner side of the back wall l. Thus, when the burners 16 are lighted, the products of combustion and the flame issuing therefrom are directed against the top wall 15* of the combustion box supporting a plurality of spaced tubular heating conduits 17 whose upper ends communicate with a common exhaust manifold 18 located in the path of an air discharge opening 19 of a blower casing.

The inner heater casing H includes the sealing wall 9 having port 15*; combustion box 15 including burner 16 and top wall 15 which supports spaced heater tubes 17, leading to manifold 18 in the path of air from blower 23. The ported flanges ll of the sealing wall 9 extend forwardly to engage the front panel 6 of the outer or main housing H and extend vertically from the blower exit to the top wall 15 of the burner housing.

It will, therefore, be understood that the gas burners 16 are supplied with fresh air through opening 15 to sustain combustion and the resulting heat passes through the eflicient thin walled spaced tubular heater elements 17 into the exhaust manifold 18 so that the blower will force heated air downwardly behind the front panel 6 of the outer housing and thence through the heated air pressure chamber defined thereby in connection with the sealing wall 9 of the inner heater casing to make its way through the louvers '7 of the front panel 6 and, also, through the ports 12 into the vertical and horizontal headers formed between the inner heating casing and the outer housing.

The blower compartment having the forced air discharge opening 19 comprises a back wall 20, a top wall 21, side walls 22, and a relatively open front wall behind which a fan-type blower 23 is mounted. This blower, when in operation draws room space air through the louvered inlet 3 in the top wall 2 of the main housing and also through the upper intake grille 24 of the front panel 6. Accordingly, it will be understood that the blower 23 taking air through inlets 3 and 24 will force the same through opening 19 downwardly into the heating space or chamber between the sealing wall 9, the front panel 6, and

within the limits of the side Walls 11-11 and top wall 15* of the heater chamber, thereby building up pressure in said chamber for forcing heated air through the outlets 12 into the headers 13 and into the header space between Walls 8 and 10 from which air may be takenupon removing the patch plate 8 7 From the foregoing it willbe understood that the assembly described provides an outer housing which serves as a primary support for an inner heater casing so arranged that fresh air can be admitted to the combustion chamber 16, and that heated air from between and about the tubular members 17 will be forced into the heating chamber formed between sealing wall 9 and the front panel 16, so as to provide a sufiicient head of pressure to obtain effective distribution where desired.

We claim: I

'1. A wall furnace comprising, in combination;

a main outer housing H including a back wall 1 having afresh air intake opening 4, oppo site outer side walls 5, and

a top wall 2 having a room space air inlet 3;

a vertically disposed front panel 6 spaced from said back wall 1, said front panel having an upper room space air inlet 24 and a lower room space air outlet 7;

a fresh air intake flue F connected to said back wall 1 through said opening 4,

an inner heater casing H including l a fresh air sealing'wall 9 extending from the top wall Zdownwardly to a point substantially near the lower end of the back wall 1 where it is closed C said fresh air sealing wall having a combustion box port 15 and spaced from said back wall 1 to provide a fresh air chamber communicating with said fresh air flue 4,

ported inner side walls 11 at opposite edges of the sealintake chamber to said heater intake port 15 a burner 16, 7

means 15+15 providing a combustion box for the burner 16 in communication withtsaid port 15 and also including a top wall 15,

an exhaust flue F passing through the air intake flue F,

a plurality of spaced vertically disposed heat exchanging tubes 17, extending upward from the top wall 15' of the combustion box and having their upper end portions disposed substantially at right angles and having a manifold connection with said exhaust flue and blower means 19-|2+21+22+23 in the top portion of the outer housing H for drawing air through the opening 3 in the top wall and the louvers 24 of the front panel 6 and forcing said air downwardly about said heat-exchanger tubes 17 and within the space between the front wall 6 and sealing wall 9 to said room space heating outlet 7 and the ported opposite inner side flanges 11 of said inner heater casing into the said headers 13.

2. A wall furnace according toclaim 1, wherein the blower includes a compartment in the top of the main housing constituted by an imperforate back wall 20, a top wall 21 and side walls 22 respectively spaced from the top wall 2 and outer side walls 5 of the main housing H and also from the sealing wall 9, said blower compartment communicating with the upper inlet 24 of the front panel 6 and a bottom opening 19 discharging into the area of said heat exchanger tubes 17.

References Cited in the file of this patent UNITED STATES PATENTS 2,361,643 Mueller Oct. 31, 1944 2,470,571 Miller May 17, 1949' 2,506,120 Turner May 2, 1950 2,532,089 Crell Nov. 28, 1950 2,942,600 Heiman June 28, 1960 2,966,838 Thompson et al. Jan. 3, 1961 3,056,397 Little Oct.. 2, 1962 3,064,638 Bauer Nov. 20, 1962 

1. A WALL FURNACE COMPRISING, IN COMBINATION; A MAIN OUTER HOUSING H INCLUDING A BACK WALL 1 HAVING A FRESH AIR INTAKE OPENING 4, OPPOSITE OUTER SIDE WALLS 5, AND A TOP WALL 2 HAVING A ROOM SPACE AIR INLET 3; A VERTICALLY DISPOSED FRONT PANEL 6 SPACED FROM SAID BACK WALL 1, SAID FRONT PANEL HAVING AN UPPER ROOM SPACE AIR INLET 24 AND A LOWER ROOM SPACE AIR OUTLET 7; A FRESH AIR INTAKE FLUE F CONNECTED TO SAID BACK WALL 1 THROUGH SAID OPENING 4, AN INNER HEATER CASING H'' INCLUDING A FRESH AIR SEALING WALL 9 EXTENDING FROM THE TOP WALL 2 DOWNWARDLY TO A POINT SUBSTANTIALLY NEAR THE LOWER END OF THE BACK WALL 1 WHERE IT IS CLOSED C2, SAID FRESH AIR SEALING WALL HAVING A COMBUSTION BOX PORT 15A AND SPACED FROM SAID BACK WALL 1 TO PROVIDE A FRESH AIR CHAMBER COMMUNICATING WITH SAID FRESH AIR FLUE 4, PORTED INNER SIDE WALLS 11 AT OPPOSITE EDGES OF THE SEALING WALL 9 AND SPACED FROM THE INNER SURFACE OF THE OUTER SIDE WALLS 5 OF THE MAIN HOUSING TO PROVIDE WARM AIR REMOTE HEADERS 13 WITHIN AND AT EACH SIDE OF THE OUTER HOUSING H, SEALING MEANS C'' CONNECTING THE SEALING WALL 9 WITH THE BACK WALL 1 THEREBY TO COMPLETE THE FRESH AIR INTAKE CHAMBER TO SAID HEATER INTAKE PORT 15A; A BURNER 16, 